/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
 *
 * gimpitemstack.c
 * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <gegl.h>

#include "core-types.h"

#include "gimpitem.h"
#include "gimpitemstack.h"


/*  local function prototypes  */

static GObject * gimp_item_stack_constructor (GType                  type,
                                              guint                  n_params,
                                              GObjectConstructParam *params);

static void      gimp_item_stack_add         (GimpContainer         *container,
                                              GimpObject            *object);
static void      gimp_item_stack_remove      (GimpContainer         *container,
                                              GimpObject            *object);


G_DEFINE_TYPE (GimpItemStack, gimp_item_stack, GIMP_TYPE_LIST)

#define parent_class gimp_item_stack_parent_class


static void
gimp_item_stack_class_init (GimpItemStackClass *klass)
{
  GObjectClass       *object_class    = G_OBJECT_CLASS (klass);
  GimpContainerClass *container_class = GIMP_CONTAINER_CLASS (klass);

  object_class->constructor = gimp_item_stack_constructor;

  container_class->add      = gimp_item_stack_add;
  container_class->remove   = gimp_item_stack_remove;
}

static void
gimp_item_stack_init (GimpItemStack *stack)
{
}

static GObject *
gimp_item_stack_constructor (GType                  type,
                             guint                  n_params,
                             GObjectConstructParam *params)
{
  GObject       *object;
  GimpContainer *container;

  object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);

  container = GIMP_CONTAINER (object);

  g_assert (g_type_is_a (gimp_container_get_children_type (container),
                         GIMP_TYPE_ITEM));

  return object;
}

static void
gimp_item_stack_add (GimpContainer *container,
                     GimpObject    *object)
{
  g_object_ref_sink (object);

  GIMP_CONTAINER_CLASS (parent_class)->add (container, object);

  g_object_unref (object);
}

static void
gimp_item_stack_remove (GimpContainer *container,
                        GimpObject    *object)
{
  GIMP_CONTAINER_CLASS (parent_class)->remove (container, object);
}


/*  public functions  */

GimpContainer *
gimp_item_stack_new (GType item_type)
{
  g_return_val_if_fail (g_type_is_a (item_type, GIMP_TYPE_ITEM), NULL);

  return g_object_new (GIMP_TYPE_ITEM_STACK,
                       "name",          g_type_name (item_type),
                       "children-type", item_type,
                       "policy",        GIMP_CONTAINER_POLICY_STRONG,
                       "unique-names",  TRUE,
                       NULL);
}

void
gimp_item_stack_invalidate_previews (GimpItemStack *stack)
{
  g_return_if_fail (GIMP_IS_ITEM_STACK (stack));

  gimp_container_foreach (GIMP_CONTAINER (stack),
                          (GFunc) gimp_viewable_invalidate_preview,
                          NULL);
}